Dual lift rocker arm latch mechanism and actuation...

Details Dual lift rocker arm latch mechanism and actuation... Dual lift rocker arm latch mechanism and actuation...

2008-01-15

2008-01-15

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Rocker

C123S090160, C123S090440, C074S559000

Reexamination Certificate

active

11633778

ABSTRACT:
A valve control system for an engine having a camshaft with first and second cam profiles, the valve control system comprising a rocker arm assembly including a first rocker arm having a first cam follower in engagement with the first cam profile, and a second rocker arm having a second cam follower in engagement with the second cam profile. The first rocker arm includes a latch member biased toward a latched condition by a fluid pressure in a chamber, and the first rocker arm defines a fluid passage having a first end in open fluid communication with the pressure source, and a second end in open fluid communication with the pressure chamber. An alignment feature cooperates with the latch member to ensure proper alignment with a latch surface.

REFERENCES:
patent: 5524580 (1996-06-01), Muir
patent: 5544626 (1996-08-01), Diggs et al.
patent: 5584267 (1996-12-01), Muir
patent: 5655488 (1997-08-01), Hampton et al.
patent: 5697333 (1997-12-01), Church et al.
patent: 6615782 (2003-09-01), Hendriksma et al.
patent: 6668779 (2003-12-01), Hendriksma et al.

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